28051669001 has 2 divisors, whose sum is σ = 28051669002. Its totient is φ = 28051669000.

The previous prime is 28051668979. The next prime is 28051669021. The reversal of 28051669001 is 10096615082.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27572934601 + 478734400 = 166051^2 + 21880^2 .

It is a cyclic number.

It is not a de Polignac number, because 28051669001 - 2⁶ = 28051668937 is a prime.

It is a super-2 number, since 2×28051669001² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28051669021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14025834500 + 14025834501.

It is an arithmetic number, because the mean of its divisors is an integer number (14025834501).

Almost surely, 2^28051669001 is an apocalyptic number.

It is an amenable number.

28051669001 is a deficient number, since it is larger than the sum of its proper divisors (1).

28051669001 is an equidigital number, since it uses as much as digits as its factorization.

28051669001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 38.

The spelling of 28051669001 in words is "twenty-eight billion, fifty-one million, six hundred sixty-nine thousand, one".